gradient technique meaning in Chinese

梯度技术

Test method for density of plastics by the density - gradient technique
密度梯度技术测定塑料密度的方法
Standard test method for density of plastics by the density - gradient technique
用密度梯度法测定塑料密度的标准试验方法
In this paper , we prepared 110x80mm ti : al2o3 crystal ( 11 stone ) by directional temperature gradient technique ( dtgt ) , choosed its top , middle part and bottom , and fabricated powder samples with carnelian mortar . then we observed and analyzed the surface of ti stone by using sem , and found it is ti that is the main component of the black thing on the surface of ti stone
本文采用导向温度梯度法制备了110 80mmti ： al _ 2o _ 3晶体(钛宝石) ，并取其上部、中部、下部用玛瑙研钵制成粉末样品，用扫描电子显微镜对钛宝石表面进行了观察分析，结果表明钛宝石表面上的黑色物质的主要成分为钛。